diff --git a/sdk/js/src/relayer/consts.ts b/sdk/js/src/relayer/consts.ts
index fd0811402..2beac3b24 100644
--- a/sdk/js/src/relayer/consts.ts
+++ b/sdk/js/src/relayer/consts.ts
@@ -242,10 +242,13 @@ export const getWormscanAPI = (_network: Network) => {
   }
 };
 
-export const CCTP_DOMAIN_TO_NAME = [
-  "ethereum",
-  "avalanche",
-  "optimism",
-  "arbitrum",
-  "base",
-];
+export const getNameFromCCTPDomain = (
+  domain: number
+): ChainName | undefined => {
+  if (domain === 0) return "ethereum";
+  else if (domain === 1) return "avalanche";
+  else if (domain === 2) return "optimism";
+  else if (domain === 3) return "arbitrum";
+  else if (domain === 6) return "base";
+  else return undefined;
+};
diff --git a/sdk/js/src/relayer/relayer/helpers.ts b/sdk/js/src/relayer/relayer/helpers.ts
index b37badccb..0a2a581e6 100644
--- a/sdk/js/src/relayer/relayer/helpers.ts
+++ b/sdk/js/src/relayer/relayer/helpers.ts
@@ -16,7 +16,7 @@ import {
   getWormholeRelayerAddress,
   getCircleAPI,
   getWormscanAPI,
-  CCTP_DOMAIN_TO_NAME,
+  getNameFromCCTPDomain,
 } from "../consts";
 import {
   parseWormholeRelayerPayloadType,
@@ -82,9 +82,9 @@ export function printChain(chainId: number) {
 }
 
 export function printCCTPDomain(domain: number) {
-  if (domain >= CCTP_DOMAIN_TO_NAME.length)
+  if (getNameFromCCTPDomain(domain) === undefined)
     throw Error(`Invalid cctp domain: ${domain}`);
-  return `${CCTP_DOMAIN_TO_NAME[domain]} (Domain ${domain})`;
+  return `${getNameFromCCTPDomain(domain)} (Domain ${domain})`;
 }
 
 export const estimatedAttestationTimeInSeconds = (
@@ -536,7 +536,7 @@ export async function getCCTPMessageLogURL(
   );
   const MessageSentTopic = ethers.utils.keccak256("MessageSent(bytes)");
   try {
-    if (CCTP_DOMAIN_TO_NAME[cctpKey.domain] === sourceChain) {
+    if (getNameFromCCTPDomain(cctpKey.domain) === sourceChain) {
       const cctpLogFilter = (log: ethers.providers.Log) => {
         return (
           log.topics[0] === DepositForBurnTopic &&